I had GD, I had a natural 3 hour labour at 39 weeks (so avoided planned induction at 40 weeks). I expressed colostrum before birth (I was part of a study at the hospital) and stored it in milk bags. The plan was that my colostrum could be used rather than formula if I struggled to feed after labour. Also expressing produces oxytocin which can bring on labour (orgasms do to), I think that is what triggered my labour. It is safe to try expressing from 37 weeks and I did it every evening in a warm bath. Ask your midwife about it.
Just to reassure you, it is rare for babies to need additional feeding and you can normally feed yourself as soon after birth, ask your midwife to help you feed before baby is cleaned and weighed etc.
The main thing you need to focus on is minimising your blood sugar so that your baby gains as little extra weight as possible. Follow a low GI diet and be strict with yourself, it's hard work but it really pays off. Dd was 6lb 2oz, far away from being a podgy GD affected baby.i found combining foods helped, so I never had carbohydrate (bread, pasta, fruit etc) without eating fat or protein (cheese, meat, eggs etc). The fat and protein slows the absorption of the glucose in the carbs. Go for high fibre carbs, so brown rice and pasta, sweet potato rather than mashed white potato etc. you should see a dietician but I also found looking at sites about type 2 diabetes helped me work out what I could eat.
Keep a food diary and don't snack between meals so you can work out what your trigger foods are, youll find some things will push your blood sugar much higher than others. For example, I found I could eat Ben and Jerry's ice cream I guess because of the high fat content, but I couldn't eat sugar free muesli even though my dietician recommended it for breakfast.
I had something like scrambled egg on granary toast for breakfast, chicken salad for lunch and meat and veg casserole with a small jacket potato for dinner. Sugar free jelly and high fat ice cream were my favourite desserts.
Don't panic, your result is fairly low. Work hard on your diet and you should have minimal consequences.